Figure 7

(a) The relationship between insulation defects of fault discharge and the characteristic parameters (SO2 + SO2F2)/(CF4 + CO2) and CF4/CO2 calculated by the Random Forest method with the contour model. (b) The relationship between insulation defects of fault discharge and the characteristic parameters (SO2 + SO2F2)/(CF4 + CO2) and CF4/CO2 calculated by the Gaussian Distribution method with the contour model.